I am looking for a good diy home security system with indoor lasers and a siren anyone know a good site?

Thank you my family has been a victim of a robbery when we were not home during the day . We are allready getting a dog and now we need the security. I dont want a system that someone else monitors if its monitored I want to be the one that is notified of a intrusion not a home security company.Any info on this would be great .

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